What are the percentages of scores that fall between in the tails of a normal distributio
Q: How to know if a histogram is a normal distribution
A: In general, the graph of the normal distribution is bell-shaped and symmetric. Here, bell shape of…
Q: The scores on a test in a particular class follow a Normal distribution with mean μ=140 and standard…
A: We have given that Normal distribution with mean μ=140 and standard deviation σ=23. Find…
Q: A normal distribution has a mean of µ = 80 with σ = 20. What score separates the lowest 30% of the…
A:
Q: Why do t distribution tend to be flatter and more spread out than the normal distribution is?
A: t distribution is more spread out than the normal distribution
Q: Diastolic blood pressures are assumed to follow a normal distribution with a mean of 85 and a…
A: Consider X be a random variable which follows normal variable indicates diastolic blood pressure. It…
Q: Supposed the mean height for men is 70 inches with the standard deviation of 2 inches what…
A: Given that , Mean μ=70 Standard deviation σ=2 find the percentage of men are between 68 and 74…
Q: Almost all medical schools in the United States require students to take the Medical College…
A: Solution: Given that: n= 25 Sample sizeμ= 510 Population mean σ= 10.4 Population standard deviation.…
Q: In a National Achievement Test, the mean was found to be 62 and the standard deviation was 10. The…
A: "Since you have posted a question with multiple subparts, we will solve first 3 sub-parts for you.…
Q: A simple random sample of 36 observations was taken from a large population. The sample mean and the…
A: The sample mean and the standard deviation are μ = 80 and σ = 12 respectively.Let X denotes the…
Q: What happens to the proportion of intervals that include the population proportion as the sample…
A: The formula for the confidence interval of population proportion can be written as: Here n is the…
Q: Explain the difference between binomial and normal distribution
A: It is asked to tell the difference between the binomial and normal distribution
Q: Entrance examination scores are normally distributed with a mean of 75 and standard deviation of 10.…
A: We have, Population mean (μ)=75Population standard deviation (σ)=10
Q: mean=32, population standard deviation=7, normal distribution, to find value of less then…
A:
Q: What proportion of the data from a standard normal distribution has a value between 0.26 and 0.95?…
A: Normal distribution is a continuous distribution which has many real life applications. Normal curve…
Q: What are the values of the mean and standard deviation of a standard normal distribution. what is…
A: given that distribution is standard normal dostributionl
Q: 4. On standard IQ tests, the mean is 100 with standard deviation 15. The results are very close to…
A: Given Information: Mean = 100 Standard deviation = 15
Q: The mean of a normal distribution is 400 pounds. The standard deviation is 10 pounds. What is the…
A: The mean is 400 and the standard deviation is 10.
Q: What proportion of scores of a normal distribution is less than z = 2.80?
A: Obtain the proportion of scores of a normal distribution is less than z =2.80. The proportion of…
Q: How do I determine standard deviation of an average score?
A: Solution: Let X be the score and n be the sample size. Standard deviation of scores should be known…
Q: Statisticians believe that if a test is valid, it should follow a normal distribution with a mean of…
A: Statisticians believe much time if the test is valid it follows Normal Distribution many times but…
Q: mandatory competency test for high school sophomores has a normal distribution with a mean of 329…
A:
Q: For a normal distribution of negative Z score means tha
A: Z-score value is negative.
Q: What are the strengths and weaknesses of the mean (average) as the measure of the center of the…
A: In statistics, three measures of central tendency are widely used. These three measures are also…
Q: Almost all high school students who intend to go to college take the SAT test. In a recent test, the…
A: Let X denotes the SAT scores of all students who take this test. Given that X follows normal…
Q: Diastolic blood pressure are assumed to follow a normal distribution with a mean of 85 and a…
A:
Q: A vending machine is designed to dispense a mean of 7.2 oz of coffee into an 8-oz cup. If the…
A: From the provided information, Mean (µ) = 7.2 oz Standard deviation (σ) = 0.4 oz
Q: What percent of cases ARE NOT between the mean and 0.21 standard deviations above the mean?
A:
Q: The scores on a test in a particular class follow a Normal distribution with mean μ=140 and standard…
A: The scores on a test in a particular class follow a Normal distribution with mean μ=140 and standard…
Q: The distribution of SAT scores is normal with a mean of µ = 500 and a standard deviation of σ = 100.…
A: Obtain the SAT score separates the top 25% of the distribution from the rest. The SAT score…
Q: If the mean is lower than the median. Describe the distribution.
A: Mean is the average of the set of observations and median is middle most value of the observations.
Q: The percentage of area under the normal curve between the mean and 0.8 standard deviations from the…
A: The percentage of area under the normal curve between the mean and 0.8 standard deviations from the…
Q: II) The scores on a test approximate a normal distribution with a mean score of 72 and a standard…
A:
Q: What proportion of scores of a normal distribution is less than z = 2.80? What proportion of scores…
A:
Q: The scores on a test in a particular class follow a Normal distribution with mean μ=140 and standard…
A: We have given that mean=μ=140 , standard deviation=σ=23 X~Normal(μ=140,σ=23)
Q: What are the predictor variables in general and what we can observe in general—normal distribution,…
A: Histogram: A simple bar graph of the data where the width bars are the range of the data and the…
Q: What is the mean of a distribution of means that is blank the means of the population?
A: Given problem Given that
Q: A division-wide aptitude test was conducted on 10 000 pupils. the mean of the test is 58 and…
A: Given, A division-wide aptitude test was conducted on N=10 000 pupils. The test, The scores also…
Q: A simple random sample of 36 observations was taken from a large population. The sample mean and the…
A:
Q: Intelligent quotient (IQ) scores form a normal distribution with µ = 100 and σ = 15. Individuals…
A: Let "X" be the IQ scores.
Q: What percentage of z-scores in the standard normal distribution are less than z = –.35?
A: Given that, z = –0.35 We have to calculate P(Z< -0.35)
Q: The monthly income of 5,000 workers at the Microsoft development plant are distributed normally. The…
A:
Q: The mean and standard deviation of a population are 300 and 75, respectively. Sample size is 49.…
A: Given Data Population Mean,μ = 300.0 Population Standard Deviation,σ = 75.0 sample…
Q: In a national achievement test, the mean was found to be 62 and the standard deviation was 10. The…
A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: What z-score value separates 15% of the distribution in the tail on the right (i.e., the top 15% of…
A: Solution: From the given information,
Q: What are the percentages of scores that fall between -1 and 0/0 and 1? -2/1 and 2? and in the tails…
A: We solve probability value by using of empirical rule.
Q: Diastolic blood pressures are assumed to follow a normal distribution with a mean of 90 and a…
A: A continuous random variable X is said to follow Normal distribution with parameters μ and σ2 if its…
Q: A professor gave final examination to 110 students. Eighteen students had scores that were more than…
A: Consider that a professor gave a final examination to 110 students. 18 students had had examination…
Q: How do you find IQR with mean and standard deviation of normal distribution. when the mean is 15 and…
A: The mean is 015 and the standard deviation is 5.
Q: joans finishing time for the bolder boulder 10k race was 1.77 standard deviations faster than the…
A: We have to find given probability.
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